Nut-machine



E. HOLLINGS.`

NU MACHINE.

APPLICATION FILED Ame, 1911.

l 3 l 9X9@ Patented Get. 28, 1919.

3 SHEETS-SHEET l.

Tm; CDLUMBIA PLANOURAPII co, WASHINGTON, D4 cy www@ ` E. HOLLINGS.

"NUT MACHINE.

APPLICATION FILED APR. 6, i911.

Patented Oct. 28, 1919.

3 SHEETS-SHEET 2- -rnn rm mnu N mounwu' cn., wAsNumTow, nu;

E. HOLLINGS.

NUT MACHNE.

APPLICATION msn APR.6,1917.

Patented 001;. 2&5, i919.

3 SHES-SHEET 3.

UNlTE ERNEST HOLLINGS, lClIE CLEVELAND, OHIO.

NUT-MACHINE.

Specification of Letters Patent.

Patented Oct. 28, 1919.

Application filed April 6, 1917. Serial No. 160,206.

To all whom it may concer/a:

Be it known that'I, ERNEST HOLLINGS, a subject of the ling of England,residing at Cleveland, in the co-unty of Cuyahoga and State of Ohio,have invented certain new and useful lmprovements in Nut-Machines, ofwhich the following is a specification.

lThis invention relates to nut forging 1na chines of the type whichutilizes a hollow die block and two or more plungers and punches forworking a nut blank therein. ln such machines the central punching orslug is usually forced into the hollow plunger' against the retreatingpunch therein, which later advances and ejects the punching fromv theplunger. Frequently the punching adheres to the punch when it emergesfrom the plunger, due to fins or uneven places on the punching orbecause of magnetic or other attraction of the punching to the punch, so'that it does not drop off, thereby interfering with the next operationand possibly causing` injury to the tools.

The object of this invention is to provide means for kicking olf theslug from the punch or plunder thereby protecting the machine andavoiding the possibility of in jury thereto.

The invention comprises the construction and arrangement of partshereinafter described and clain'led.

ln the drawings, liigure 1 represents a longitudinal sectional elevationthrough a. nut machine embodying the invention; 2 is a similar detailview, on a larger scale, showing the kick off device; Fig. 3 is a planview thereof; Fig. f1 is a detail end view from the left in Fig'. 3;Fig. 5 is a detail sectional elevation showing another embodiment of theinvention; Fig. 6 is a plan view thereof; and Fig. 7 is a detail endview from the left in Fig. 5.

The nut machine shown in the drawings is an improvement upon the.machine shown in my Patent No. 1,255,166 for nut machine grantedFebruary 5, 1918, to which reference may be had for a more completedescription of the main features of the inachine. Briefly described7 itcomprises the usual die block 1, upper and lower indenter carryingslides 2, reciprocating hollow plungers 8, 3a, and reciprocating punches4,-, 4a. Slides 2 are actuated by cams 5 on a shaft 6.

Plunger 3 is on a slide 7, while punch La is carried by a block 8slidably mounted in said slide '7. Slide '7 and block 8 are actuated toproduce the necessary independent recprocating movements of said plungerandV punch by cams on a shaft 9. Plunger 3 is carried by a slide 10actuated by a connecting rod or rods 11, connected to an eccentric 12 onshaft 13, while punch t is carried by a Iblock lt sliding in slide 10and actuated by a spring 15 and a cam 16 on said eccentric. Shafts 6, l)and 13 are intergeared and driven in unison by power applied to thepulley 17 on the driving shaft H.

So far as described the machine is identr cal with that of my priorpatent referred to.` In operation the bar is indented and the nut blanksheared therefrom and carried into the die by the plunger where it iscompressed between the two plungers 3. 3 and expanded by the punches t,4 which also enter the blank and reduce the thickness of the punchingand then move endwise to shear it out from the blank. Plunger 3 andpunch l then retreat, carrying with them the punching, until the partsreach the position shown in Fig. 2, in which the plunger has retreatedbeyond the punch, causing the latter to protrude from the plunger andeject the punching. During the retreating movement of the plunger thekick ott' device now to be described is actuated to kick ofi' thepunching from the end of the punch and insure its removal therefrom.

In the forms shown in Figs. 1 to -t the kick off device comprises an arm19 pivoted upon a transverse axis 2O on the stationary frame andcarrying` intermediate its ends a roller or projection 21, and havingits advance end extending laterally to form a linger 22 adapted byoscillation oi' said arm to move across vthe end face of the punch whenthe latter is retracted, as in Fig. 2. Said arm is held downwardly by atension spring 23. Its roller 21 lies over a cam plate 24- attached tothe plunger slide 10 and having an inclined upper operating edge 25 anda horizontal elevated portion 26.

lVith this arrangement when the plunger and slide are advanced theroller 21 rides up the incline 25 to the horizontal portion 2G and liftsthe finger 22 out of the way of the punch and plunger, but when theslide lO retreats the roller rides down over the incline and the finger22 moves across the end face of t e punch and kicks off the slug shouldit stick to the punch.

Various other arrangements are also suitable for the purpose. Forexample, in Figs. 5, 6 and 7 the kick orf device comprises an arm 27pivoted upon a shaft 28 carried by the plunger slide 10, and which armhas a finger 29 adapted to move across the face of the punch. Arm 27also carries a gear segment 30 whose teeth engage a rack 3l Carried bythe stationary frame of the machine.

With this arrangement retreating or backward movement or the slide movesthe nger 29 down across the punch, while advancing movement swings it upout of the way of the punch and plunger. y

The construction described is simple and protects the machine againstinjury by slugs, which might cause damage if not removed. The inventioncan obviously be applied to nut machines with various arrangements ofpunches and plungers and is not restricted to the particular machineshown.

That I claim isl. A nut machine, comprising a frame, a stationary dieblock thereon, a reciprocating slide on said frame carrying a plungerworking in said die block, a. sliding punch Within said plunger, aswinging arm carried by said slide having a portion movable across theend oi the punch and plunger when retracted i'or removing aslug from thepunch, and means controlled by the reciprocating movement of said slidefor operating said arm.

2. A nut machine, comprising a frame, a stationary die block thereon, a.reciprocating slide on said frame carrying a plunger working in said dieblock, a sliding punch within said plunger, a swinging arm carried bysaid slide having a portion movable across the end of the punch andplunger when retracted for removing a slug from the punch, a gearsegment connected to said arm, and a stationary rack on the Jframecooperating with said segment for operating said arm.

In testimony whereof I ailix my signature.

ERNEST HOLLINGS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

